GE Multilin 489-P5-HI-A1 489 Generator Management Relay
PHASE DISTANCE (IMPEDANCE)
Characteristics: offset mho
Reach (secondary Ω): 0.1 to 500.0 Ω in steps of 0.1
Reach accuracy: ±5%
Characteristic angle: 50 to 85° in steps of 1
Time delay: 0.15 to 150.0 s in steps of 0.1
Timing accuracy: ±50 ms or ±0.5% of total time
Number of zones: 2
GROUND DIRECTIONAL
Pickup level: 0.05 to 20.00 × CT in steps of 0.01
Time delay: 0.1 to 120.0 s in steps of 0.1
Pickup accuracy: as per phase current inputs
Timing accuracy: ±100 ms or ±0.5% of total time
Elements: Trip and Alarm
GROUND OVERCURRENT
Pickup level: 0.05 to 20.00 × CT in steps of 0.01
Curve shapes: ANSI, IEC, IAC, Flexcurve, Definite Time
Time delay: 0.00 to 100.00 s in steps of 0.01
Pickup accuracy: as per ground current input
Timing accuracy: +50 ms at 50/60 Hz or ±0.5% total time
Elements: Trip
HIGH-SET PHASE OVERCURRENT
Pickup level: 0.15 to 20.00 × CT in steps of 0.01
Time delay: 0.00 to 100.00 s in steps of 0.01
Pickup accuracy: as per phase current inputs
Timing accuracy: ±50 ms at 50/60 Hz or ±0.5% total time
Elements: Trip
INADVERTENT ENERGIZATION
Arming signal: undervoltage and/or offline from breaker status
Pickup level: 0.05 to 3.00 × CT in steps of 0.01 of any one phase
Time delay: no intentional delay
Pickup accuracy: as per phase current inputs
Timing accuracy: +50 ms at 50/60 Hz
Elements: Trip
LOSS OF EXCITATION (IMPEDANCE)
Pickup level: 2.5 to 300.0 Ω secondary in steps of 0.1 with adjustable
impedance offset 1.0 to 300.0 Ω secondary in steps of 0.1
Time delay: 0.1 to 10.0 s in steps of 0.1
Pickup accuracy: as per voltage and phase current inputs
Timing accuracy: ±100 ms or ±0.5% of total time
Elements: Trip (2 zones using impedance circles)
NEGATIVE SEQUENCE OVERCURRENT
Pickup level: 3 to 100% FLA in steps of 1
Curve shapes: I2
2t trip defined by k, definite time alarm
Time delay: 0.1 to 100.0 s in steps of 0.1
Pickup accuracy: as per phase current inputs
Timing accuracy: ±100ms or ± 0.5% of total time
Elements: Trip and Alarm
NEUTRAL OVERVOLTAGE (FUNDAMENTAL)
Pickup level: 2.0 to 100.0 V secondary in steps of 0.01
Time delay: 0.1 to 120.0 s in steps of 0.1
Pickup accuracy: as per neutral voltage input
Timing accuracy: ±100 ms or ±0.5% of total time
Elements: Trip and Alarm
NEUTRAL UNDERVOLTAGE
(3RD HARMONIC)
Blocking signals: low power and low voltage if open delta
Pickup level: 0.5 to 20.0 V secondary in steps of 0.01 if open delta VT;
adaptive if wye VT
Time delay: 5 to 120 s in steps of 1
Pickup accuracy: as per Neutral Voltage Input
Timing accuracy: ±3.0 s
Elements: Trip and Alarm
OFFLINE OVERCURRENT
Pickup level: 0.05 to 1.00 × CT in steps of 0.01 of any one phase
Time delay: 3 to 99 cycles in steps of 1
Pickup accuracy: as per phase current inputs
Timing accuracy: +50ms at 50/60 Hz
Elements: Trip
OTHER FEATURES
Serial Start/Stop Initiation, Remote Reset (configurable digital input), Test Input
(configurable digital input), Thermal Reset (configurable digital input), Dual
Setpoints, Pre-Trip Data, Event Recorder, Waveform Memory, Fault
Simulation, VT Failure, Trip Counter, Breaker Failure, Trip Coil Monitor,
Generator Running Hours Alarm, IRIG-B Failure Alarm
OVERCURRENT ALARM
Pickup level: 0.10 to 1.50 × FLA in steps of 0.01 (average phase current)
Time delay: 0.1 to 250.0 s in steps of 0.1
Pickup accuracy: as per phase current inputs
Timing accuracy: ±100 ms or ±0.5% of total time
Elements: Alarm
OVERFREQUENCY
Required voltage: 0.50 to 0.99 × rated voltage in Phase A
Block from online: 0 to 5 sec. in steps of 1
Pickup level: 25.01 to 70.00 in steps of 0.01
Curve shapes: 1 level alarm, 2 level trip definite time
Time delay: 0.1 to 5000.0 s in steps of 0.1
Pickup accuracy: ±0.02 Hz
Timing accuracy: ±150 ms or ±1% of total time at 50Hz and 60Hz; ±300 ms or 2%
of total time at 25Hz
Elements: Trip and Alarm
OVERLOAD / STALL PROTECTION / THERMAL MODEL
Overload curves:
15 Standard Overload Curves, Custom Curve, and Voltage Dependent
Custom Curve (all curves time out against average phase current)
Curve biasing: Phase Unbalance, Hot/Cold Curve Ratio, Stator RTD, Online
Cooling Rate, Offline Cooling Rate, Line Voltage
Overload pickup: 1.01 to 1.25
Pickup accuracy: as per phase current inputs
Timing accuracy: ±100 ms or ±2% of total time
Elements: Trip and Alarm
OVERVOLTAGE
Pickup level: 1.01 to 1.50 × rated V in steps of 0.01
Curve shapes: Inverse Time, definite time alarm
Time Delay: 0.2 to 120.0 s in steps of 0.1
Pickup accuracy: as per Voltage Inputs
Timing accuracy: ±100 ms or ±0.5% of total time
Elements: Trip and Alarm
PHASE DIFFERENTIAL
Pickup level: 0.05 to 1.00 × CT in steps of 0.01
Curve shape: Dual Slope
Time delay: 0 to 100 cycles in steps of 1
Pickup accuracy: as per phase current inputs
Timing accuracy: +50 ms at 50/60 Hz or ±0.5% total time
Elements: Trip
PHASE OVERCURRENT
Voltage restraint: programmable fixed characteristic
Pickup level: 0.15 to 20.00 × CT in steps of 0.01 of any one phase
Curve shapes: ANSI, IEC, IAC, FlexCurve, Definite Time
Time delay: 0.000 to 100.000 s in steps of 0.001
Pickup accuracy: as per phase current inputs
The 489 Generator Management Relay is a microprocessor-based relay designed for the protection and management of
synchronous and induction generators. The 489 is equipped with 6 output relays for trips and alarms. Generator protection,
fault diagnostics, power metering, and RTU functions are integrated into one economical drawout package. The single line
diagram below illustrates the 489 functionality using ANSI (American National Standards Institute) device numbers
469-P1-HI-A1
469-P1-HI-A20
469-P5-LO-A1
469-P5-LO-A20
469-P5-HI-A1
469-P5-HI-A20
489-P1-LO-A1
489-P1-LO-A20
489-P1-HI-A1
489-P1-HI-A20
489-P5-LO-A1
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Warranty:
All our products are covered by our own warranty.
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